HP LaserJet PRO M521 Repair Manua page 9

2 Parts and diagrams ...................................................................................................... 139
Order parts by authorized service providers ............................................................................ 140
Order parts, accessories, and supplies .................................................................... 140
Supplies part numbers ........................................................................................... 140
Customer self-repair (CSR) and service kits ............................................................... 141
Related documentation and software ...................................................................................... 142
Fasteners used in this product ................................................................................................ 142
How to use the parts lists and diagrams .................................................................................. 143
Assembly locations ............................................................................................................... 143
Base product (no optional trays or accessories) ......................................................... 143
Base product (optional trays or accessories) ............................................................. 144
Covers ................................................................................................................................ 146
Document feeder and scanner assemblies ............................................................................... 148
Control-panel and USB PCA assemblies .................................................................................. 150
Document feeder assemblies .................................................................................................. 152
Internal assemblies (1 of 6) ................................................................................................... 154
Internal assemblies (2 of 6) ................................................................................................... 156
Internal assemblies (3 of 6) ................................................................................................... 158
Internal assemblies (4 of 6) ................................................................................................... 160
Internal assemblies (5 of 6) ................................................................................................... 162
Internal assemblies (6 of 6) ................................................................................................... 164
Input devices ....................................................................................................................... 166
500-sheet input tray (Tray 3) .................................................................................. 166
Alphabetical parts list ........................................................................................................... 168
Numerical parts list .............................................................................................................. 172
Index ............................................................................................................................... 177
ENWW
Environmental sensor .............................................................................. 128
High-voltage power supply (HVPS) ........................................................... 130
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